The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 21, 2025
Filed:
Oct. 19, 2024
Robert B. Stuart, San Tan Valley, AZ (US);
Robert B. Stuart, San Tan Valley, AZ (US);
Milo Group LLC, Casper, WY (US);
Abstract
A device for preventing ground fault in electric distribution lines caused by a break in a line, utilizing programmable relay protection in a plurality of relay devices with microprocessors, programmed to monitor high sensitivity parameters, the device having refined protection, which includes: in MODULE A, programmed to detect changes in negative sequence overcurrent and instantaneous undercurrent on main distribution lines or single phase tap lines, utilizing a timer delay to calculate changes over small time periods. Second and third embodiments include substituting negative sequence with zero sequence readings in MODULE B or combining both MODULES A and B.